Hacks of Electronics
IC 7490 is Asynchronous mod-10 Counter IC. In this article, we are going to study IC 7490 Decade Counter Circuit. IC 7490 is also known as BCD Counter, Decade Counter, and mod-10. These names are given based on the Functionality and Working Principle of IC 7490. Counter Designing using 7490 IC: In the discussion of Counter ICs, some basic […]
Have you thought about who turns on and off those street lights on the road? Turning on and off those street lights may be a boring task. We can make this process automatic by a simple automatic street light circuit. Also, you can automate your home lighting, lights in the garden, and other outside places […]
In this project, we will use the MQ2 Gas sensor circuit to detect Methane, Butane, LPG, Smoke which is released into the environment at the time of the gas leak. MQ2 Gas sensor circuit diagram is as shown in the figure. MQ2 gas sensor can sense butane, LPG, Smoke, Alcohol, Propane, Hydrogen, Methane and Carbon […]
Introducing the musical 16 Tune musical doorbell circuit diagram, it produces a different musical tune each time the bell push button is pressed. The bell produces a total of 16 tunes which follows successively. Music Doorbell is a harmonious fusion of functionality and creativity that transforms the mundane act of answering the door into a […]
A voltage comparator is a circuit which compares the voltages at its input terminals and switches the output to either high or low depending upon which input was high. making a voltage comparator using transistors and other components is quite difficult and makes no sense because we have OPAMPs. We can use 741, LM311, LM324, […]
Voltage to current converter is mostly used to transmit signals over a long distance to a control circuit. The most important reason behind it is that while traveling a long distance due to the internal resistance of the wire the voltage gets reduces. if there is a very small signal then it may get lost. […]